Filter element



FIG. 1 is a front view of a filter element, showing my new design;

FIG. 2 is a right side view of the filter element, the left side view being, a mirror image;

FIG. 3 is a rear view of the filter element;

FIG. 4 is a top plan view of the filter element;

FIG. 5 is a bottom pl an view of the filter element; and,

FIG. 6 is a perspective view of the filter element.

The broken lines showing are for illustrative purposes and form no part of the present invention. 

The ornamental design for a filter element, as shown and described. 